Definition

Noun: A localized, upward-moving current of air. An updraft is a meteorological phenomenon where air rises vertically, often due to convective heating or when wind encounters a topographic barrier like a mountain.

Usage

The word "updraft" is used to describe the upward movement of air in various contexts, primarily in meteorology, aviation, and activities like gliding or soaring.

Examples

• The glider pilot searched for a thermal updraft to gain altitude.
• The formation of a cumulonimbus cloud is fueled by a powerful updraft.
• Hawks often circle within an updraft along the cliff face, allowing them to soar without flapping their wings.

Advanced Usage

• "Updraft" in severe weather: In supercell thunderstorms, a rotating updraft (a mesocyclone) is a key feature that can lead to tornado formation.
• "Updraft" vs. "Downdraft": These are contrasting terms. An updraft refers to rising air, while a "downdraft" refers to a column of sinking air.

Variants and Related Words

• Updraft is a closed compound noun. It is typically written as one word.
• Updraught (noun): This is a chiefly British English spelling variant of "updraft."
• Thermal (noun): A type of updraft caused by localized heating of the Earth's surface.
• Upcurrent (noun): A less common synonym for updraft.

Synonyms

• Upcurrent
• Rising air column
• Upward current

Antonyms

• Downdraft
• Downdraught
• Sinking air

Related Phrases and Concepts

• Updraft velocity: The speed at which the air is rising.
• To catch an updraft: A phrase used in aviation and by birds meaning to enter and use an upward air current to climb.
• Orographic updraft: An updraft created when horizontal wind is forced upward by a mountain slope or other terrain feature.

Noun

1. a strong upward air current